These brand new Kryptonics Wheels wheels are high-quality and made to last. They measure 60mm in diameter and 76a in hardness, and will provide a smooth ride. Includes: One (1) set of 60mm Kryptonics Wheels Star Trac Wheels (4 wheels total) plus one (1) box of Bones REDS Precision Skate Rated Skateboard Bearings (8 bearings total). Note: Bearings are not installed in wheels. Once installed, product cannot be returned or exchanged.